EP 2829621 B1 20171108 - METHOD FOR PRODUCING HEMATITE FOR IRON PRODUCTION
Title (en)
METHOD FOR PRODUCING HEMATITE FOR IRON PRODUCTION
Title (de)
VERFAHREN ZUR HERSTELLUNG VON HÄMATIT ZUR EISENERZEUGUNG
Title (fr)
PROCÉDÉ DE PRODUCTION D'HÉMATITE POUR LA PRODUCTION DE FER
Publication
Application
Priority
- JP 2012062793 A 20120319
- JP 2013050669 W 20130116
Abstract (en)
[origin: EP2829621A1] Provided is a method for producing hematite for ironmaking, wherein high purity hematite, which can be used as an iron-making raw material, is cheaply and efficiently recovered from a leach residue containing iron oxide produced by a high pressure acid leach (HPAL) process. This method for producing (high purity) hematite for ironmaking in a process of adding a mineral acid and an oxidant to ore containing iron and valuable metals and then leaching the valuable metals under high pressure and high temperature includes (1) a neutralization step of adding a neutralizer to a leachate obtained under high pressure and high temperature to form a leach slurry, (2) a solid-liquid separation step of separating the leach slurry obtained in the neutralization step (1) into a leach residue and the leachate, and (3) a classification step of classifying the leach residue into the hematite and gangue components.
IPC 8 full level
C01G 49/06 (2006.01); C01B 17/50 (2006.01); C22B 3/04 (2006.01); C22B 23/00 (2006.01)
CPC (source: EP US)
C01G 49/06 (2013.01 - EP US); C22B 3/44 (2013.01 - EP US); C01P 2004/61 (2013.01 - US); Y02P 10/20 (2015.11 - EP US)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
EP 2829621 A1 20150128; EP 2829621 A4 20151209; EP 2829621 B1 20171108; AU 2013236726 A1 20141009; AU 2013236726 B2 20151217; CA 2867421 A1 20130926; CA 2867421 C 20160913; CN 104204246 A 20141210; CN 104204246 B 20170301; JP 2013194283 A 20130930; JP 5454815 B2 20140326; PH 12014502103 A1 20141210; PH 12014502103 B1 20141210; US 2015023851 A1 20150122; US 9255013 B2 20160209; WO 2013140836 A1 20130926
DOCDB simple family (application)
EP 13763969 A 20130116; AU 2013236726 A 20130116; CA 2867421 A 20130116; CN 201380015128 A 20130116; JP 2012062793 A 20120319; JP 2013050669 W 20130116; PH 12014502103 A 20140922; US 201314386172 A 20130116